const http = require('http');
const createError = require('http-errors');
const express = require('express');
const path = require('path');
const cookieParser = require('cookie-parser');
const logger = require('morgan');
const config = require('./config');
const cors = require('cors');
const createWebSocketServer = require('./websocket');

const indexRouter = require('./routes/index');
const usersRouter = require('./routes/users');

const app = express();
const server = http.createServer(app);
const wss = createWebSocketServer(server);

// 使用 CORS 中间件
app.use(cors());

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use((req, res, next) => {
  req.wss = wss;
  next();
});

app.use('/', indexRouter);
app.use('/users', usersRouter);

app.use(function(req, res, next) {
  if(req.url.startsWith("/download/")){
    next(createError(404,"文件不存在，请重新下载！"));
  }else{
    next(createError(404));
  }
});

app.use(function(err, req, res, next) {
  
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  res.status(err.status || 500);
  res.render('error');
});

server.listen(config.port, () => {
  console.log(`Server is running on port ${config.port}`);
});

module.exports = app;